Run digest cycle in web worker
summary
Moves an Angular 1 digest cycle and model into a Web Worker so CPU‑heavy prime-number computation no longer blocks the page, keeping the UI responsive during repeated clicks. Client keeps mock scopes that call the worker via postMessage with stringified functions, losing lexical scope but preserving scope properties; worker runs a micro-Angular, reconciles model changes and returns generated HTML. Change detection on the client uses Object.observe to post updates; demo proves it works though it requires function serialization and newer APIs.
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